CVE-2019-11757: Use After Free
First published: Tue Oct 22 2019(Updated: )
A use-after-free flaw was found in Mozilla Firefox and Thunderbird. When following a value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. An attacker could use this flaw to execute code that was stored in the referenced memory or crash the system.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/firefox | <0:68.2.0-4.el6_10 | 0:68.2.0-4.el6_10 |
| redhat/thunderbird | <0:68.2.0-2.el6_10 | 0:68.2.0-2.el6_10 |
| redhat/firefox | <0:68.2.0-1.el7_7 | 0:68.2.0-1.el7_7 |
| redhat/thunderbird | <0:68.2.0-1.el7_7 | 0:68.2.0-1.el7_7 |
| redhat/firefox | <0:68.2.0-2.el8_0 | 0:68.2.0-2.el8_0 |
| redhat/thunderbird | <0:68.2.0-1.el8_0 | 0:68.2.0-1.el8_0 |
| redhat/firefox | <68.2 | 68.2 |
| redhat/thunderbird | <68.2 | 68.2 |
| Mozilla Thunderbird | <68.2 | 68.2 |
| Mozilla Firefox ESR | <68.2 | 68.2 |
| Mozilla Firefox | <70 | 70 |
| Mozilla Firefox | <70.0 | |
| Mozilla Firefox ESR | <68.2 | |
| Mozilla Thunderbird | <68.2 | |
| Canonical Ubuntu Linux | =16.04 | |
| debian/firefox | 132.0.2-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.4.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.4.0esr-1~deb12u1 128.3.1esr-2 128.4.0esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.4.3esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.4.0esr-1~deb12u1 1:128.4.2esr-1 1:128.4.3esr-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-11757 https://nvd.nist.gov/vuln/detail/CVE-2019-11757 https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11757
- https://bugzilla.redhat.com/show_bug.cgi?id=1764438
- https://access.redhat.com/errata/RHSA-2019:3281
- https://access.redhat.com/errata/RHSA-2019:3756
- https://access.redhat.com/errata/RHSA-2019:3193
- https://access.redhat.com/errata/RHSA-2019:3210
- https://access.redhat.com/errata/RHSA-2019:3196
- https://access.redhat.com/errata/RHSA-2019:3237
- https://access.redhat.com/security/cve/cve-2019-11757
- https://bugzilla.mozilla.org/show_bug.cgi?id=1577107
- https://www.mozilla.org/security/advisories/mfsa2019-33/
- https://www.mozilla.org/security/advisories/mfsa2019-34/
- https://www.mozilla.org/security/advisories/mfsa2019-35/
- https://security.gentoo.org/glsa/202003-10
- https://usn.ubuntu.com/4335-1/
- https://launchpad.net/bugs/cve/CVE-2019-11757
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11757
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11764
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/#CVE-2019-11757
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/#CVE-2019-11757
- https://security-tracker.debian.org/tracker/CVE-2019-11757
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11757
- https://nvd.nist.gov/vuln/detail/CVE-2019-11757
- https://ubuntu.com/security/CVE-2019-11757
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is vulnerability CVE-2019-11757?
Vulnerability CVE-2019-11757 is a use-after-free flaw found in Mozilla Firefox and Thunderbird.
What is the severity of vulnerability CVE-2019-11757?
The severity of vulnerability CVE-2019-11757 is high with a severity value of 8.8.
Which software is affected by vulnerability CVE-2019-11757?
Vulnerability CVE-2019-11757 affects Mozilla Firefox and Thunderbird versions 68.2.0-4.el6_10, 68.2.0-2.el6_10, 68.2.0-1.el7_7, 68.2.0-1.el8_0, and Firefox ESR 68.2.
How can an attacker exploit vulnerability CVE-2019-11757?
An attacker can exploit vulnerability CVE-2019-11757 to execute code stored in referenced memory or cause a crash.
Where can I find more information about vulnerability CVE-2019-11757?
You can find more information about vulnerability CVE-2019-11757 in the following references: [Reference 1](https://bugzilla.mozilla.org/show_bug.cgi?id=1577107), [Reference 2](https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/), [Reference 3](https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/).
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